【名词&注释】
压缩空气系统(compressed air system)、极限值、活塞环(piston ring)、故障率(failure rate)、船舶动力装置(marine power plant)、区域内(intra-region)、不允许(not allow)
[单选题]A-frames and cylinder block is held together by () to form a rigid structure.
A. connecting rods
B. piston rods
C. tie rods
D. jack-bolt
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学习资料:
[单选题]船舶动力装置的管路系统,按用途不同可分为()类,即()。
A. 2/动力系统、辅助系统
B. 2/辅助系统、船舶系统
C. 2/动力系统、辅助系统、冷藏系统
D. 3/蒸汽系统、液压系统、压缩空气系统
[单选题]故障率λ(t)是针对到时刻t尚能正常工作的产品数而言的;().Ⅱ.密度函数f(t)是针对开始时刻的产品数而言的
A. 仅Ⅰ对
B. 仅Ⅱ对
C. Ⅰ,Ⅱ都对
D. Ⅰ,Ⅱ都不对
[单选题]在船上吊缸检查活塞组件时,不必检测()。
A. 活塞环的弹力
B. 天地间隙
C. 搭口间隙
D. 活塞环的金相组织和硬度
[单选题]当铁梨木轴承的轴承间隙超过标准,而铁梨木板条的厚度低于极限值时应采用()修理。
A. 换新轴承
B. 更换下瓦
C. 更换艉轴铜套
D. 更换艉轴
[单选题]桨叶上A区位于桨叶压力面0.4R以内范围,该区域内(intra-region)的缺陷一般不允许(not allow)()修理。
A. 有机胶黏剂
B. 无机胶黏剂
C. 金属扣合工艺
D. 焊补
[单选题]A hot air start pipe indicates that there is ().
A. inefficient cooling
B. a leaking air start valve
C. a clogged drain valve
D. a leaking air bottle
[单选题]The cooling of the piston is carried out by circulating () across the underside of the crown and inside the ring belt or through specially shaped passages.
A. sea water
B. scavenging air
C. lubricating oil
D. fuel oil
[单选题]The piston ring grooves for a standard engine are ()
A. chromium-plate against wear
B. anti-corrosion treated
C. white metal lined against wear
D. flame hardened against wear
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